onerous - vocabulary

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Burdensome, oppressive, troublesome.
We have the means to change the laws we find unjust or onerous. We cannot, as citizens, pick and choose the laws we will or will not obey.

—Former President Ronald Reagan Speech to the United Brotherhood of Carpenters and Joiners after he dismissed 12,000 air-traffic controllers who went out on strike in violation of federal law.  Chicago, Illinois, September 3, 1981.